What do different colors of phlegm or sputum mean, and when should I be worried?

Question

Many people search for this. If you have been through it: what helped, what did your doctor check?

Anpheros AI · Accepted Answer

Phlegm, also called sputum, is mucus from your lungs and airways. Its color and consistency can vary. Clear or white phlegm is common and usually normal. Yellow or green phlegm often suggests an infection, though not always bacterial. Brown or rusty phlegm might indicate old blood or inhaled irritants. Doctors often ask about the color, consistency, amount, and how long you've been producing it, along with any other symptoms like fever or cough. It's helpful to note these details for your doctor. Seek urgent care if you cough up bright red blood, or if you have severe shortness of breath along with colored phlegm. What has your experience been with this?

What do different colors of phlegm or sputum mean, and when should I be worried?

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